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As a rule, the most common RAID levels in use today are:
- No RAID - logical data volumes exist within single physical drive
- RAID 0 - logical data volumes striped across multiple physical drives with no parity/data protection. Common, but not necessarily a good idea (backup is important here).
- RAID 1 - logical data volumes mirrored, bit-for-bit, between two physical drives (in come implementations, additional mirror drives can be created)
- RAID 5 - logical data volumes striped across multiple drives with parity/data protection generated and distributed among all drives in the RAID set.
Three notes come to mind:
- Depending on implementation, RAID devices appear as a logical (or physical) drive to the OS or application. Software RAID, configurable in utilities such as in Windows Disk Manager or MDADM (Linux) works just below the operating system, providing a representation of a virtual physical disk to the operating system.
- Sometimes, RAID levels are combined, such as RAID 0+1 (striped, then mirrored) or RAID 1+0/10 (mirrored, then striped).
- As drives and RAID sets get larger (2-3 TB+), the time to recalculate/recover data for a failed physical drive becomes prohibitive, both in downtime/degraded operation and vulnerability to data loss from an additional failure.
A number of new technologies, as well modifications to classic RAID, are being explored to address shortcoming 3.
Wiki User
∙ 6y ago
Wiki User
∙ 13y agoRAID is a method of combining several hard disk drives into one logical unit (two or more disks grouped together to appear as a single device to the host system).
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What is a hard-disk technology is used for large computer systems?
RAID
What is Intel rapid storage technology?
Intel Rapid Storage Technology is a firmware RAID system. Intel Matrix RAID, Intel Rapid RAID, and Intel Smart Response Technology are features of Intel Rapid Storage Technology.
Who invented RAID 5 technology?
I did...
Which RAID technology stores parts of each file on different disks?
raid 0
What is RAID technology in server?
RAID technology uses multiple disk drives to achieve either fault tolerance or an increase in read and write performance.
What technology would be best to use for drive redundancy and data protection?
A Raid technology.
How do you hook up two disc drives in a raid format?
You hardware has to support RAID technology, read the manual for your motherboard. If you have Linux you can have software RAID which is slower than hardware but still can be used to for mirroring, striping and so on. In the manual should described how to create RIAD (0, 1 and so on). You can have RAID software for windows too, but it's expensive and perfomance is not that great.
How many disks can be used for RAID 1?
The total no. of disks that are required to make RAID 1 is 3
What aircraft was used in the first bombing raid on Tokyo?
The famous Doolittle Raid that was launched from an aircraft carrier used B-25 Mitchell bombers.
What does raid mean?
raidis a surprise attack by a small armed force
Why have different block sizes for different partitions?
Sometimes using different block size can improve performance especially for RAID technology. If you are not using RAID, you will not see noticeable improvement if you change the block size.
What are the three main versions of RAID?
Even thought there are more than 20 different variants of RAID, they all spawn off of three main technology standards. 1.) Striped (RAID 0) 2.) Mirrored (Raid 1) 3.) Parity (Raid 3,4,5,6) From those three you can create vast complex arrays. For example; RAID 5X5 +1 is what our NAS server has it consists of 50 HDD's where this array combines all three technologies.
